<?php

/**
 * PHPTAL templating engine
 *
 * PHP Version 5
 *
 * @category HTML
 * @package  PHPTAL
 * @author   Laurent Bedubourg <lbedubourg@motion-twin.com>
 * @author   Kornel Lesiński <kornel@aardvarkmedia.co.uk>
 * @license  http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License
 * @version  SVN: $Id$
 * @link     http://phptal.org/
 */

/**
 * @package PHPTAL
 * @subpackage Php.attribute.phptal
 * @author Laurent Bedubourg <lbedubourg@motion-twin.com>
 */
class PHPTAL_Php_Attribute_PHPTAL_TALES extends PHPTAL_Php_Attribute {

  public function before(PHPTAL_Php_CodeWriter $codewriter) {
    $mode = trim($this->expression);
    $mode = strtolower($mode);

    if ($mode == '' || $mode == 'default')
      $mode = 'tales';

    if ($mode != 'php' && $mode != 'tales') {
      throw new PHPTAL_TemplateException("Unsupported TALES mode '$mode'", $this->phpelement->getSourceFile(), $this->phpelement->getSourceLine());
    }

    $this->_oldMode = $codewriter->setTalesMode($mode);
  }

  public function after(PHPTAL_Php_CodeWriter $codewriter) {
    $codewriter->setTalesMode($this->_oldMode);
  }

  private $_oldMode;

}
